从Java Bean对象获取字段值映射

/*
时 代 J a v a 公 众 号 - nowjava.com 提供
*/


//package com.nowjava;

import java.lang.reflect.Field;

import java.lang.reflect.Method;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.HashMap;

import java.util.Locale;

import java.util.Map;


public class Main {

    public static void main(String[] argv) throws Exception {

        Object bean = "nowjava.com";
        /* 
        *来 自
         NowJava.com - 时代Java
        */

        System.out.println(getFieldValueMap(bean));

    }


    public static Map<String, String> getFieldValueMap(Object bean) {

        Class<?> cls = bean.getClass();

        Map<String, String> valueMap = new HashMap<String, String>();

        // ????bean??????

        Method[] methods = cls.getDeclaredMethods();

        Field[] fields = cls.getDeclaredFields();


        for (Field field : fields) {

            try {

                String fieldType = field.getType().getSimpleName();

                String fieldGetName = parGetName(field.getName());

                if (!checkGetMet(methods, fieldGetName)) {

                    continue;

                }

                Method fieldGetMet = cls.getMethod(fieldGetName,

                        new Class[] {});

                Object fieldVal = fieldGetMet.invoke(bean, new Object[] {});

                String result = null;

                if ("Date".equals(fieldType)) {

                    result = fmtDate((Date) fieldVal);

                } else {

                    if (null != fieldVal) {

                        result = String.valueOf(fieldVal);

                    }

                }

                if (result != null && !"".equals(result)

                        && !"page".equals(field.getName())

                        && !"rows".equals(field.getName())) {

                    valueMap.put(field.getName(), result);

                }

            } catch (Exception e) {

                continue;

            }

        }

        return valueMap;


    }


    public static String parGetName(String fieldName) {

        if (null == fieldName || "".equals(fieldName)) {

            return null;

        }

        return "get" + fieldName.substring(0, 1).toUpperCase()

                + fieldName.substring(1);

    }


    public static boolean checkGetMet(Method[] methods, String fieldGetMet) {

        for (Method met : methods) {

            if (fieldGetMet.equals(met.getName())) {

                return true;